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Leonidas Kontothanassis

Tech lead, Google Cambridge

Kontothanassis leads a 30-member team at Google's local outpost focused on "networking infrastructure." Essentially, they are the resident speed demons. "My team works on how to make Google and the Internet as a whole faster," he writes in a typically terse e-mail. It examines everything from browsers to servers to advertisements to data protocols, trying to make Google's Web offerings even zippier.